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# AQA Statistics watch

1. (Original post by anon123)
i think that wen u got 433 u multiplied it by 0.8 to get the answer, nt sure tho
so is it right? cuz i took 390 as being 0.9 out of 1 and 1 represented 0.8 of french students.lol.
2. whoops theres another 3 marks gone!!!!but wait 390 mulitiplied by 0.8 is 312???
ahh well its over now, if i've done badly c'est la vie!

but at the same time i hope every1 else has done badly so i'll bring the grade boundaries down!!!!lol!

lookin back maybe it wasnt too bad, histogram was fine and cumalative frequency step ok i think!did ever1 get 13(think it was 13 maybe i'm wrong) for the median?
3. ****ing hell. the paper was really hard. questions were sneaky unlike other past papers. past papers asked u straightforward to calculate something. in this exam they asked something else and u had to use formulas.it was sooo unfair they gave only 4 marks to the questions where we had to find s.d and mean. they were like the hardest ones.should be 7 marks.
the questions about probability i did with proportions
if 390 is 0.9
then x is 1
therefore x = 390*1/0.9
4. I dont seem to recognise any of these numbers people are coming out with ... Im rather worried now!
5. i ****ing dont recognise anything. I honestly ****ed up it.I sooo didnt want it. ahhhhhh. God wanted to make a joke of me.this is outrageous.
6. Ok there were about 4500 fish in the pond? Cant remeber the exact number but something between 4000 - 5000.

The probability of someone being good at spanish was 0.24?
Cant remeber what the last probability question was!
7. i think it was like 0.8*0.9+0.2*0.3
lol
so it is 0.78
i dont know for sure.
for fish pond it was something like
300/14 and then times 100. I dont know whether it is right.lol.
8. (Original post by IZZY!)
i ****ing dont recognise anything. I honestly ****ed up it.I sooo didnt want it. ahhhhhh. God wanted to make a joke of me.this is outrageous.
don't worry ppl- we all screwed up! well, apart from the snotty year 10s at my school who think they're so great cos they finished 40 mins early (tho i bet they got half of it wrong anyway). as for God- what have u done to **** him off lately? i'd vouch for satan being the one to make a mockery of u...if it makes anyone feel better u only needed 129 out of 160 (with coursework) to get an A* last year.
9. omg. thats like 80% for an A*. too much, I ****ed up.lol.
10. Thinking about it ive worked out that the fish was 2109?

The question was - 100 fish pulled out and all tagged?
Then 300 were pulled out and 14 had tags.
How many fish in the pond?

So 300 = 14 tagged.
So 600 would mean 28 tagged
1200 = 56 tagged
1800 = 84 tagged
2100 = 98 tagged
and an extra two is 2109.333 to give the 100 tagged?

This gives 2109 because you cant have 1/3 of a fish?
11. omg, this looks right.i ****ed up honestly.
12. I didnt write that in the exam though - I somehow worked out about 4000! in the exam. Now i feel different! Dam IT!
13. (Original post by Davror)
Thinking about it ive worked out that the fish was 2109?

The question was - 100 fish pulled out and all tagged?
Then 300 were pulled out and 14 had tags.
How many fish in the pond?

So 300 = 14 tagged.
So 600 would mean 28 tagged
1200 = 56 tagged
1800 = 84 tagged
2100 = 98 tagged
and an extra two is 2109.333 to give the 100 tagged?

This gives 2109 because you cant have 1/3 of a fish?

I used the formula: no. tagged divided by total population= no. recaptured that were tagged divided by total recaptured....

so 100 divided by tp = 14 divided by 300 (0.46666666etc)

rearrange:
100 divided by 0.466666etc =total population
so tp =2142.857......hope that's right!
14. **** it. i wanna shoot myself. I self taught myself, spending 2 hours every day. It feels so **** I ****ed up. I rly wanted a high grade, but now I see it is over. BTw what did u get for standard deviation and mean? I got 180 for mean and something like 30 with something for s.d.
15. (Original post by Gothic pixie)
I used the formula: no. tagged divided by total population= no. recaptured that were tagged divided by total recaptured....

so 100 divided by tp = 14 divided by 300
(0.46666666etc)

rearrange 100 divided by 0.466666etc =total population
so tp =2142.857......hope that's right!
ahhh i got the same thing.
i divided 300 by 14 and then timed it by 100.lol.
16. (Original post by IZZY!)
**** it. i wanna shoot myself. I self taught myself, spending 2 hours every day. It feels so **** I ****ed up. I rly wanted a high grade, but now I see it is over. BTw what did u get for standard deviation and mean? I got 180 for mean and something like 30 with something for s.d.
That's true dedication! i just read the revision guide! think i got 180.5 for mean and something like 31.4 for std dev but not too sure...probably made a mistake somewhere anyway...
17. for the spanish and frrench one i got 400 which im pretty sure is right
18. (Original post by Gothic pixie)
That's true dedication! i just read the revision guide! think i got 180.5 for mean and something like 31.4 for std dev but not too sure...probably made a mistake somewhere anyway...
yep i got same answers. it was too hard to find s.d.
19. 390 good at spanish
p(good at spanish)=0.78
that means 500 people alltogether ( 390/0.78=500)
p(french)=0.8
0.8x500=400
20. ****.**** ****.

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